73108-78-8Relevant academic research and scientific papers
Supported Palladium Nanoparticles-Catalyzed Synthesis of 3-Substituted 2-Quinolones from 2-Iodoanilines and Alkynes Using Oxalic Acid as C1 Source
Thakur, Vandna,Sharma, Ajay,Yamini,Sharma, Nishtha,Das, Pralay
supporting information, p. 426 - 431 (2018/12/13)
3-Aryl/alkyl-2-quinolones were synthesized employing microwave assisted multicomponent reaction of 2-iodoanilines, terminal alkynes and oxalic acid dihydrate ((CO2H)2 ? 2H2O) under polystyrene supported palladium (Pd@PS) nanoparticles-catalyzed conditions. The use of a heterogeneous palladium catalyst was explored first time for 2-quinolone synthesis involving carbonylation reaction employing (CO2H)2 ? 2H2O as a solid and bench stable carbon monoxide (CO) source. The reaction exhibited good substrate generality for 2-iodoanilines and alkynes with wide functional group tolerance and good regio-selectivity. The ligand free operation, recyclability of heterogeneous Pd@PS catalyst and use of bench stable C1 source are the invaluable merits of the protocol. (Figure presented.).
Synthesis of 3-substituted quinolin-2(1H)-ones via the cyclization of o-alkynylisocyanobenzenes
Charoenpol, Ailada,Meesin, Jatuporn,Khaikate, Onnicha,Reutrakul, Vichai,Pohmakotr, Manat,Leowanawat, Pawaret,Soorukram, Darunee,Kuhakarn, Chutima
, p. 7050 - 7054 (2018/10/17)
A facile synthesis of various functionalized 3-substituted quinolin-2(1H)-ones through Ag(i) nitrate-catalyzed cyclization of o-alkynylisocyanobenzenes is described. The reaction allows rapid and convenient access to 3-substituted quinolin-2(1H)-one scaffolds in moderate to good yields.
Metal-free ring expansion of indoles with nitroalkenes: A simple, modular approach to 3-substituted 2-quinolones
Aksenov, Alexander V.,Smirnov, Alexander N.,Aksenov, Nicolai A.,Aksenova, Inna V.,Matheny, Jonathon P.,Rubin, Michael
, p. 8647 - 8656 (2015/03/03)
3-Substituted 2-quinolones are obtained via a novel metal-free transannulation reaction of 2-nitroolefins with 2-substituted indoles in polyphosphoric acid. This acid-mediated cascade transformation operates via the ANRORC (Addition of Nucleophile, Ring Opening, and Ring Closure) mechanism and can be used in combination with the Fisher indole synthesis to offer a practical three-component hetero-annulation approach to 2-quinolones from arylhydrazines, 2-nitroalkenes, and acetophenone. An alternative entry to this chemistry employing the alkylation of electron-rich arenes and hetarenes with 1-(2-indolyl)-2-nitroalkene has also been demonstrated.
Highly efficient modular metal-free synthesis of 3-substituted 2-quinolones
Aksenov, Alexander V.,Smirnov, Alexander N.,Aksenov, Nicolai A.,Aksenova, Inna V.,Bijieva, Asiyat S.,Rubin, Michael
supporting information, p. 9786 - 9788 (2014/12/12)
A modular approach to 3-substituted 2-quinolones via a cascade annulation reaction between 4-nitroketones and hydrazines has been developed.
Metal-free transannulation reaction of indoles with nitrostyrenes: A simple practical synthesis of 3-substituted 2-quinolones
Aksenov, Alexander V.,Smirnov, Alexander N.,Aksenov, Nicolai A.,Aksenova, Inna V.,Frolova, Liliya V.,Kornienko, Alexander,Magedov, Igor V.,Rubin, Michael
supporting information, p. 9305 - 9307 (2013/10/01)
3-Substituted 2-quinolones are obtained via a novel, metal-free transannulation reaction of 2-substituted indoles with 2-nitroalkenes in polyphosphoric acid. The reaction can be used in conjunction with the Fisher indole synthesis offering a practical three-component heteroannulation methodology to produce 2-quinolones from arylhydrazines, 2-nitroalkenes and acetophenone.
Microwave-assisted, palladium-catalyzed carbonylative cyclization - Rapid synthesis of 2-quinolones from unprotected 2-iodoanilines and terminal alkynes
Chen, Jia-Rong,Liao, Jie,Xiao, Wen-Jing
experimental part, p. 331 - 337 (2010/07/08)
Palladium-catalyzed cyclocarbonylations of 2-iodoanilines with various terminal alkynes have been carried out by the use of commercially available molybdenum hexacarbonyl as a convenient and solid carbon monoxide source. The reactions were conducted at 160 °C for 30 min under microwave irradiation and in the presence of Et3N in THF, affording the corresponding 2-quinolone derivatives in good regioselectivities and yields.
Pharmaceutical compositions comprising 2-quinolones
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, (2008/06/13)
The invention concerns a pharmaceutical composition having an activity on the proliferation of clonogenic cells in tumours and comprising an efficient amount of a compound selected among the compounds of formulae (I) and (Ia) wherein: X, R1, R
Synthesis and Properties of o-Hydroxyphenyl- and o-Acetylaminophenyl-Substituted Cyclopropenones. A Novel Thermal Transformation of Functionalized Cyclopropenones
Eicher, Theophil,Schneider, Volker
, p. 372 - 378 (2007/10/02)
The ortho-functionalized arylphenylcyclopropenones 3 are prepared via the West method and their spectroscopic and chemical properties are reported.The cyclopropenones 3 undergo thermal transformation to give heterocycles 7, 8, 12, photochemically they are
Synthesis of 3-Arylcoumarins, Thiacoumarins and Carbostyrils
Natarajan, M.,Manimaran, T.,Ramakrishnan, V. T.
, p. 529 - 534 (2007/10/02)
3-Arylcarbostyrils (2a-f), coumarins (2g-j) and thiacoumarin (2k) have been prepared by a generalised method from α,β-dibromohydrocinnamoyl derivatives (1a-k).The intermediate dihydrocoumarins and dihydrocarbostyrils (3, Y = O, NH) have been prepared which on acid treatment furnish 2.However, treatment of 3 with a base affords the 4-arylcoumarins and carbostyrils (4).
A New Route for the Synthesis of Coumarins, Thiacoumarins and Carbostyrils
Natarajan, M.,Ramakrishnan, V. T.
, p. 720 - 727 (2007/10/02)
3-Arylcarbostyrils, coumarins and thiacoumarins (3) have been prepared from the respective β-aryl-α-bromodihydrocinnamoyl derivatives (2) by treatment with AlCl3.The β,β-diarylacrylic acid derivatives (4) and (9), obtained from 2, on reaction with AlCl3 afford 4-arylcarbostyrils (5) 6-methyl-4-phenylthiacoumarin (10) respectively.However the oxygen analogs (11) give 3,3-diphenyl-1-indanone (12)
